# OPENSUSE-SU-2026:21168-1: MozillaThunderbird security update OPENSUSE-SU-2026:21168-1, released June 29, 2026, fixes 56 CVEs in MozillaThunderbird (version 140.12.0-bp160.1.1). None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/opensuse-su-2026-21168-1 - Platform: Linux - Released: Jun 29, 2026 - Priority: Urgent (Closes CVE-2026-12297, rated Critical) - CVEs: 56, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://osv.dev/vulnerability/openSUSE-SU-2026:21168-1 ## Applies to | Product | Release | Fixed in | |---|---|---| | [MozillaThunderbird](https://patchblox.com/security/data/product/linux/mozillathunderbird.md) | opensuse-leap 16.0 | 140.12.0-bp160.1.1 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-12295](https://patchblox.com/security/data/cve/CVE-2026-12295.md) | Urgent | Sandbox escape in the DOM: Navigation component | 9.6 | 0.0039 | | | [CVE-2026-12296](https://patchblox.com/security/data/cve/CVE-2026-12296.md) | Urgent | Sandbox escape in the Security: Process Sandboxing component | 9.6 | 0.0039 | | | [CVE-2026-12297](https://patchblox.com/security/data/cve/CVE-2026-12297.md) | Urgent | Sandbox escape due to incorrect boundary conditions in the Networking component | 9.6 | 0.0039 | | | [CVE-2026-12294](https://patchblox.com/security/data/cve/CVE-2026-12294.md) | Urgent | Sandbox escape in the DOM: Workers component | 9.6 | 0.0036 | | | [CVE-2026-12315](https://patchblox.com/security/data/cve/CVE-2026-12315.md) | Urgent | Mitigation bypass in the DOM: Security component | 9.1 | 0.0025 | | | [CVE-2026-12304](https://patchblox.com/security/data/cve/CVE-2026-12304.md) | Urgent | Same-origin policy bypass in the Networking: Cookies component | 9.1 | 0.0019 | | | [CVE-2026-8956](https://patchblox.com/security/data/cve/CVE-2026-8956.md) | High | Integer overflow in the Networking: JAR component | 9.8 | 0.0061 | | | [CVE-2026-8949](https://patchblox.com/security/data/cve/CVE-2026-8949.md) | High | Integer overflow in the Widget: Win32 component | 7.5 | 0.0058 | | | [CVE-2026-8946](https://patchblox.com/security/data/cve/CVE-2026-8946.md) | High | Incorrect boundary conditions in the Audio/Video: Web Codecs component | 7.5 | 0.0056 | | | [CVE-2026-8953](https://patchblox.com/security/data/cve/CVE-2026-8953.md) | High | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.6 | 0.0053 | | | [CVE-2026-12292](https://patchblox.com/security/data/cve/CVE-2026-12292.md) | High | Incorrect boundary conditions in the Web Audio component | 8.1 | 0.0049 | | | [CVE-2026-12328](https://patchblox.com/security/data/cve/CVE-2026-12328.md) | High | Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 | 8.1 | 0.0048 | | | [CVE-2026-8975](https://patchblox.com/security/data/cve/CVE-2026-8975.md) | High | Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151 | 8.8 | 0.0047 | | | [CVE-2026-8094](https://patchblox.com/security/data/cve/CVE-2026-8094.md) | High | Other issue in the WebRTC component | 9.8 | 0.0045 | | | [CVE-2026-8954](https://patchblox.com/security/data/cve/CVE-2026-8954.md) | High | Incorrect boundary conditions, integer overflow in the Audio/Video component | 7.5 | 0.0043 | | | [CVE-2026-8959](https://patchblox.com/security/data/cve/CVE-2026-8959.md) | High | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 9.6 | 0.0042 | | | [CVE-2026-8092](https://patchblox.com/security/data/cve/CVE-2026-8092.md) | High | Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thunderbird 150.0.2 | 8.1 | 0.0041 | | | [CVE-2026-8947](https://patchblox.com/security/data/cve/CVE-2026-8947.md) | High | Use-after-free in the DOM: Bindings (WebIDL) component | 7.5 | 0.0041 | | | [CVE-2026-8968](https://patchblox.com/security/data/cve/CVE-2026-8968.md) | High | Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component | 7.5 | 0.0041 | | | [CVE-2026-12327](https://patchblox.com/security/data/cve/CVE-2026-12327.md) | High | Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152 | 8.1 | 0.0041 | | | [CVE-2026-12290](https://patchblox.com/security/data/cve/CVE-2026-12290.md) | High | Memory safety bug fixed in Thunderbird 152 | 8.1 | 0.0040 | | | [CVE-2026-12289](https://patchblox.com/security/data/cve/CVE-2026-12289.md) | High | Privilege escalation in the Graphics: WebRender component | 8.8 | 0.0040 | | | [CVE-2026-8955](https://patchblox.com/security/data/cve/CVE-2026-8955.md) | High | Privilege escalation in the DOM: Workers component | 8.8 | 0.0039 | | | [CVE-2026-8957](https://patchblox.com/security/data/cve/CVE-2026-8957.md) | High | Privilege escalation in the Enterprise Policies component | 8.8 | 0.0039 | | | [CVE-2026-12291](https://patchblox.com/security/data/cve/CVE-2026-12291.md) | High | Use-after-free in the Networking: HTTP component | 8.8 | 0.0038 | | | [CVE-2026-7323](https://patchblox.com/security/data/cve/CVE-2026-7323.md) | High | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | 8.8 | 0.0038 | | | [CVE-2026-12305](https://patchblox.com/security/data/cve/CVE-2026-12305.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0037 | | | [CVE-2026-8962](https://patchblox.com/security/data/cve/CVE-2026-8962.md) | High | Mitigation bypass in the DOM: Security component | 8.1 | 0.0037 | | | [CVE-2026-8974](https://patchblox.com/security/data/cve/CVE-2026-8974.md) | High | Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151 | 8.8 | 0.0037 | | | [CVE-2026-8958](https://patchblox.com/security/data/cve/CVE-2026-8958.md) | High | Information disclosure, sandbox escape in the Security: Process Sandboxing component | 8.6 | 0.0034 | | | [CVE-2026-7320](https://patchblox.com/security/data/cve/CVE-2026-7320.md) | High | Information disclosure due to incorrect boundary conditions in the Audio/Video component | 8.8 | 0.0032 | | | [CVE-2026-8961](https://patchblox.com/security/data/cve/CVE-2026-8961.md) | High | Spoofing issue in the Form Autofill component | 7.5 | 0.0032 | | | [CVE-2026-8090](https://patchblox.com/security/data/cve/CVE-2026-8090.md) | High | Use-after-free in the DOM: Networking component | 7.5 | 0.0032 | | | [CVE-2026-7322](https://patchblox.com/security/data/cve/CVE-2026-7322.md) | High | Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 | 8.8 | 0.0032 | | | [CVE-2026-8401](https://patchblox.com/security/data/cve/CVE-2026-8401.md) | High | Sandbox escape in the Profile Backup component | 9.8 | 0.0031 | | | [CVE-2026-12329](https://patchblox.com/security/data/cve/CVE-2026-12329.md) | High | Memory safety bug fixed in Thunderbird ESR 140.12 | 7.5 | 0.0031 | | | [CVE-2026-8970](https://patchblox.com/security/data/cve/CVE-2026-8970.md) | High | Privilege escalation in the Security component | 8.8 | 0.0031 | | | [CVE-2026-12298](https://patchblox.com/security/data/cve/CVE-2026-12298.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0031 | | | [CVE-2026-12299](https://patchblox.com/security/data/cve/CVE-2026-12299.md) | High | JIT miscompilation in the DOM: Core & HTML component | 7.5 | 0.0031 | | | [CVE-2026-8391](https://patchblox.com/security/data/cve/CVE-2026-8391.md) | High | Other issue in the JavaScript Engine component | 7.5 | 0.0030 | | | [CVE-2026-12306](https://patchblox.com/security/data/cve/CVE-2026-12306.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-12307](https://patchblox.com/security/data/cve/CVE-2026-12307.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-12308](https://patchblox.com/security/data/cve/CVE-2026-12308.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0026 | | | [CVE-2026-7321](https://patchblox.com/security/data/cve/CVE-2026-7321.md) | High | Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component | 9.6 | 0.0026 | | | [CVE-2026-12310](https://patchblox.com/security/data/cve/CVE-2026-12310.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12312](https://patchblox.com/security/data/cve/CVE-2026-12312.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12314](https://patchblox.com/security/data/cve/CVE-2026-12314.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0025 | | | [CVE-2026-12302](https://patchblox.com/security/data/cve/CVE-2026-12302.md) | High | Mitigation bypass in the DOM: Security component | 7.5 | 0.0025 | | | [CVE-2026-8388](https://patchblox.com/security/data/cve/CVE-2026-8388.md) | High | Incorrect boundary conditions in the JavaScript Engine: JIT component | 7.5 | 0.0024 | | | [CVE-2026-12309](https://patchblox.com/security/data/cve/CVE-2026-12309.md) | High | Memory safety bug fixed in Thunderbird 152 | 7.5 | 0.0024 | | | [CVE-2026-12325](https://patchblox.com/security/data/cve/CVE-2026-12325.md) | High | Denial-of-service in the Graphics: ImageLib component | 7.5 | 0.0023 | | | [CVE-2026-12324](https://patchblox.com/security/data/cve/CVE-2026-12324.md) | High | Incorrect boundary conditions in the Graphics: CanvasWebGL component | 7.5 | 0.0021 | | | [CVE-2026-8950](https://patchblox.com/security/data/cve/CVE-2026-8950.md) | High | Same-origin policy bypass in the Networking: HTTP component | 9.3 | 0.0019 | | | [CVE-2026-12311](https://patchblox.com/security/data/cve/CVE-2026-12311.md) | High | Information disclosure, sandbox escape in the Security: Process Sandboxing component | 7.5 | 0.0019 | | | [CVE-2026-12313](https://patchblox.com/security/data/cve/CVE-2026-12313.md) | High | Information disclosure, sandbox escape in the Security: Process Sandboxing component | 7.5 | 0.0018 | | | [CVE-2026-12330](https://patchblox.com/security/data/cve/CVE-2026-12330.md) | High | Incorrect boundary conditions in the Internationalization component | 7.5 | 0.0016 | | --- Data as of 2026-11-09T13:31:49Z UTC. 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